Sofa



FIG. 1 is a top plan view of a sofa showing our new design with a seat cushion shown in a retracted position;

FIG. 2 is a perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a top plan view of the sofa of FIGS. 1-6 with the seat cushion shown in an extended position;

FIG. 8 is a perspective view thereof;

FIG. 9 is a left side view thereof;

FIG. 10 is a front view thereof;

FIG. 11 is a right side view thereof; and,

FIG. 12 is a rear view thereof.

The broken lines in FIGS. 3, 6, 9 and 12 represent disclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a sofa, as shown and described. 